Grandstream HandyTone 841 Analog FXO Gateway (HT841)

​The Grandstream HT841 is a 4-port analog FXO gateway designed to integrate traditional telephony infrastructure with modern VoIP networks. It allows businesses to connect analog phone lines to IP-based systems, facilitating seamless communication between legacy and VoIP environments.​

🔧 Key Specifications

Telephony Interfaces

• FXO Ports: 4 × RJ11 for connecting to the Public Switched Telephone Network (PSTN)

• FXS Port: 1 × RJ11 for connecting analog devices like telephones or fax machines​

Network Interfaces

• Ethernet Ports: 2 × 10/100/1000 Mbps RJ45 ports

  • One port supports Power over Ethernet (PoE)​

SIP & Voice Features

• SIP Profiles: Supports up to 3 SIP server profiles

• Voice Codecs: G.711 (A-law and μ-law), G.722, G.723.1, G.726-32, G.729A/B, iLBC, OPUS

• Fax Support: T.38 Fax-over-IP and G.711 pass-through

• Telephony Features: Caller ID display/block, call waiting, call transfer (blind/attended), call forwarding, call hold, do not disturb (DND), 3-way conferencing per port

• Echo Cancellation: Advanced line echo cancellation

• Jitter Buffer: Dynamic jitter buffer​

Network & Security

• Network Protocols: TCP/IP, UDP, RTP/RTCP, HTTP/HTTPS, ARP/RARP, ICMP, DNS, DHCP, NTP, TFTP, TELNET, STUN, SIP (RFC3261), SIP over TCP/TLS, SRTP, TR-069

• QoS: Layer 2 (802.1Q VLAN, SIP/RTP 802.1p), Layer 3 (ToS, DiffServ, MPLS)

• Security: TLS and SRTP encryption for secure voice communication

• Provisioning: Supports TR-069 and XML configuration files for automated provisioning​

Power & Environmental

• Power Supply Options:

  • PoE: 802.3af compliant

  • Optional 12V DC power supply

• Dimensions: Approximately 180 x 120 x 36 mm

• Weight: Approximately 356g

• Operating Temperature: 0°C to 50°C

• Humidity: 10% to 90% (non-condensing)​

Compliance

• FCC, CE, RCM​

🔑 Key Features

• Supports 3 SIP profiles through 1 FXS port and 4 FXO ports

• Integrated high-performance NAT router

• Lifeline support: FXS port is hard-relayed to FXO port in case of power outage

• Automated & secure provisioning options using TR-069

• Supports T.38 Fax for reliable Fax-over-IP

• Strong AES encryption with security certificate per unit

• Failover SIP server automatically switches to secondary server if main server loses connection

• 3-way voice conferencing per port

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